Villacastín, wool capital of the Mesta Historical milestone · Villacastín, Comunidad de Ciudad y Tierra de Segovia, Segovia Image of Villacastín, not of the place itself. During the sixteenth century Villacastín was one of the most important producing centres of the Mesta, and with the wealth of wool it paid for a church so outsized for its scale that the comarca christened it the cathedral of the Sierra. siglo XVI Photo: Villacastin (CC BY 3.0) What to see and do in Villacastín